diff --git a/hardware0.hpp b/hardware0.hpp
index 81aa614..4c7ecb6 100644
--- a/hardware0.hpp
+++ b/hardware0.hpp
@@ -17,7 +17,7 @@ enum class Driven {
 	BLOCKING,
 };
 
-template <Mode mode, class cfg = config<>, Driven driven = Driven::INTERRUPT>
+template <Mode mode = Mode::ASYNCHRONOUS, class cfg = config<>, Driven driven = Driven::INTERRUPT>
 class hardware0 {
   public:
 	using data_t = typename cfg::data_t;